A North Yorkshire Police spokesman said: "The couple who own the house and their daughter had gone to London for the weekend. The daughter has allowed two of her friends to use the house. They have invited a few people in but word has got round and gatecrashers have come in and it has all got completely out of hand. When most of them have finally gone, two men have turned up and threatened the last dozen or so youngsters and chased them out of the house."
The owners cut short their break after being contacted by police on Friday night and returned to the wrecked house on Saturday.
Quite a lot of these stories recently. I don't think people appreciate what a difference a combination of the mobile and networking sites makes. In ancient days, you had to be in the right pub at closing time to find out about the party (which you hadn't been invited to) that night. Now MSN, Bebo and texting means half the town can find out within minutes - even - perhaps especially - people who've already gone home. It might only take one wrong person with knowledge of whose parents are absent.
The other night our son was at a gathering at a friends house - his elder brother was able to establish exactly who else was there via Bebo.